Boiler-furnace.



N01 879,806. -PATENTED FEB. 18, 1908. w. N. BEST.

BOILER FURNACE.

APPLICATION FILED MAY 2.190s.

WITNESSES: I l 5 IQQ 720,

4m Ma A TTORNEYS UNITED STATES PATENT OFFICE. I

WILLIAM N. BEST, OF NEW YORK, N. Y., ASSIGNOR TO THE INTERNATIONALCALORIFIO COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OFCALIFORNIA.

BOILER-FURNACE.

.in the county and State of ew York, have invented new and usefulImprovements in Boiler-Furnaces, ofwhich the following is a full, clear,and exactdescription.

This invention relates to improvements in boiler :f-urnaces in which oilis used as a fuel, the object being to rovide means not only for thepurpose of at mitting air'requisite for combustion in the burning of afuel, but also to provide means to deflect heat so that no impingementof heat will be deflected against any of the elements of the boiler.

Other objects of the invention will appear in the chem] description.-

I wil? describe a boiler furnace embodyin my invention and then oint outthe nove features in the ap ende claims.

Reference is to e had to the accompanying drawings formin a part of thisspecification, in which simi ar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of a boiler furnace embodying myinvention; F i 2 is a section on the line m-'-m of Fig. 1; an Fig. 3 isa section on the line y-'y of Fi 1.

Referring to the drawing, 1 designates the base-plate of the fire-box orfurnace, 2 the side Walls, and 3 the front setting; and extendingthrough openings in the front setting are burners 4 which receive oil,tar, or the like, through the pi es 5, and receive steam for minglingwit the oil or tar, through the ipes 6. Supporte on the base of thefurnace and exten ed longitudinally thereof are rows of bricks 7, whichare spaced apart to provide air ducts 8 which receive air through theusual ash pit door 9.

Supported on the rows of bricks 7 is a checker-work consistin ofordinary standard fire-brick 9; this chec er-work of fire-brick has anair-space between the rows of brick of approximately about one-sixteenthof an inch, through which air can pass from the ducts 8. Throu h theseducts the air will be drawn and distri uted evenly in the furnace orfire-box 10, thus giving an even distribution of oxygen requisite forcombustion, be-

Specification of Letters Patent. Application filed May 2- 1906. SerialNo. 314.783.

Patented Feb. 18, 1908.

tween the fan-shaped flames emitted from the burner or burners.

It is vwell known that in tar and also in many oils, there is a quantityof water which often causes a great deal'of difficulty and sometimesexplosions, because of the fact that the water has .a tendency to putout the fire in the fire-box; especially if. the fire is low. I obviatethis difficulty by the use ofan i niting chamber approximately as shown,t e same being made from refracting material, which retains the heat,keeping it above the igniting temperature for a number of minutes, whilethe pocket of water is passing out of the supply ipe and burner thusinsuring the igniting of t e fuel when the tar or oil begins again toflow through the burner.

The igniting chamber as here shown consists of slabs 11 of refractorymaterial into which the burner extends. These slabsare divergent fromthe front setting and extend upward from the checker-work and if desireda cover 12 may be placed thereon; this of course, also consisting ofrefractory brick. The cover will maintain the heat as close to theburner as possible.

Extended upward from the checker-work at theinner end of the fire-box orfurnace is a cross wall 13 consisting of fire brick, the brick beinjoined by tongues and grooves, as clearly s iown in Fig. 1. This crosswall is slightly forward of the brid e wall 14, thus forming an airspace 15whic communicates with the ducts 8, and extending along theupper edge of this cross wall is an arch.16 consisting of refractorybrick tongued and grooved to ether; this arch projects forward from t ecross wall and is inclined u ward in substantial parallelism with t eboiler tubes 17, and the arch is provided at the under side with aplurality of ports 18 which permit the passage of air from the air space15 into the furnace.

With my method of equipment I et three distinct courses of flame andheat; rst from the burner or burners to the cross wall,

thence deflected by the arch, the flame and heat is forced upwardlyuntil it strikes the front end setting, when it rebounds rearwardly andu wardly through the elements of the boiler, t us spending its power soas to do no injury to the elements of the boiler. Further, with afurnace made in accordance with my invention I provide highlysuperheated air requisite for combustion, and it is the only method thatproduces three distinct courses of flame and heat after removing theordinary grate bars, and which thereby gives an even distribution ofheat throughout the entire fire-box. M

Having thus described my'invention, I

claim asn'ew and desire to secure by Letters Patent:

' 1. In a furnace, the burner extending through'the front settingthereof, a plurality of rows of brick support'edon the base of thefurnace and spaced apart to form air ducts, a bridge wall, a cross-Wall,a checker-work-of refractory blocks supported on said rows of brickfandfrom which, said cross-wall extends u ward, the said cross-wallbeingspaced from the bridge wall to form an air space communicating withthe air ducts, an arch at the upper portion of the cross-wall, andhaving perforations at its under side providing communication betweensaid air ,space and the interior of the furnace, the

erases her, a burner communicating therewith, a

bridge wall, across wall spaced therefrom to form an air passage, aconduit for delivering air from the outside atmosphere to said passage,and an arch at the upper portion of the bridge wall closing the assagebetween the cross wall and the bri ge wall and can tending into thecombustion chamber, said cross wall being provided. with perforationsadjacent the lower side of the arch, whereby air ma flow from the airpassage between the wa is into said combustion chamber and beneath saidarch.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' WILLIAM N. BEST.

Witnesses:

JNo. M; BITTER,

C. R. FERGUSON.

